CN218376527U - Hollow grouting constant-resistance anchor cable for soft rock roadway - Google Patents
Hollow grouting constant-resistance anchor cable for soft rock roadway Download PDFInfo
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- CN218376527U CN218376527U CN202222303781.4U CN202222303781U CN218376527U CN 218376527 U CN218376527 U CN 218376527U CN 202222303781 U CN202222303781 U CN 202222303781U CN 218376527 U CN218376527 U CN 218376527U
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Abstract
A hollow grouting constant-resistance anchor cable for a soft rock roadway comprises a hollow cable body, a wedge-shaped lockset, a constant-resistance device, a first tray, a positioning pipe, a grout stop plug, an anchoring body and a grouting device; one end of the hollow cable body is arranged in the anchoring body, the other end of the hollow cable body is sleeved with a constant resistor, and the first tray, the positioning pipe and the grout stopping plug are all sleeved on the constant resistor; and the plurality of grouting devices are arranged on the hollow cable body. The utility model discloses a constant resistance lets presses to strut and slip casting unique function in an organic whole, rely on constant resistance device and cable body to realize that the high resistance lets presses to strut during preliminary bracing, make country rock moderate degree under the high constant resistance effect warp, after warping to the certain degree, in time use cavity cable body structure to realize consolidating the secondary slip casting of country rock, the trouble of having avoided current constant resistance anchor rope and slip casting anchor rope to use simultaneously has been practiced thrift the material, the engineering volume has been reduced, still reduce the destruction to country rock of punching.
Description
Technical Field
The utility model relates to a supporting device field, concretely relates to soft rock tunnel cavity slip casting constant resistance anchor rope.
Background
In the mine field of China, as coal mining gradually enters a deep area, surrounding rock lithology gradually shows a large deformation phenomenon, and the surrounding rock lithology shows remarkable large deformation characteristics of soft rock, and the reinforcement and support of a deep soft rock roadway cannot be realized by adopting conventional anchor net cable support. Because deep earth pressure and soft rock have large expansion and crushing energy and are damaged by initial large release energy if rigid support is adopted, support is generally carried out in a support mode of giving first place and resisting later to effectively release initial deformation energy for deep earth pressure tunnels and soft rock tunnels. How to realize the support mode of giving first and then resisting and what support means is adopted becomes an important way for solving the support problem of deep rock pressure roadways and soft rock roadways. The main solutions to such problems at present are:
1. the method comprises the steps of adopting an anchor net cable and a steel frame for supporting, adopting the anchor net cable for supporting in the initial stage, enabling the surrounding rock to deform properly under the action of the anchor net cable for supporting, releasing the initial severe deformation energy, then adopting the steel frame for supporting strongly, and realizing rapid stabilization of the surrounding rock through the high resistance of the steel frame. The method can play a role in partial surrounding rock conditions, but for soft rock surrounding rocks, due to the fact that the strength of the surrounding rocks is poor, long-term rheology occurs under the action of long-term high ground pressure, the surrounding rocks gradually lose stability and break, and steel frames are crushed. And the anchor net cable can not realize yielding deformation, so that more damage is caused in the initial deformation process, the surrounding rock deformation is aggravated, and the strength loss of the surrounding rock is larger.
2. And adopting anchor grouting and steel frame supporting. The scheme is a supporting scheme aiming at deep earth pressure and soft rock roadway deformation which is more used at present, and has the function of reinforcing surrounding rocks, but the scheme does not use a yielding anchor rod cable, so that the initial deformation of the surrounding rocks cannot be released, the load on a steel frame is larger, the supporting density is higher generally, and the supporting cost is higher.
3. And (4) reinforcing by adopting a constant-resistance anchor rod cable and grouting. The scheme is a constant-resistance yielding scheme newly developed in recent years, grouting reinforcement is adopted, the supporting concept is suitable for deep rock pressure roadways and soft rock roadways, however, in the supporting scheme, anchor net cables need to drill anchor rod and anchor cable holes in surrounding rocks in the initial stage, grouting needs to be performed in the later stage, excessive punching damages to the surrounding rocks are large, and the self-bearing capacity of the surrounding rocks is not favorably exerted. And the quantity of anchor rod cables is large each time, the used material quantity is large, the engineering quantity is large, the construction period is long, and the surrounding rock is seriously damaged and the support is difficult to play a role due to too many anchor rod cable hole drilling under partial conditions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a soft rock tunnel cavity slip casting constant resistance anchor rope to solve above-mentioned problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a hollow grouting constant-resistance anchor cable for a soft rock roadway comprises a hollow cable body, a wedge-shaped lockset, a constant-resistance device, a first tray, a positioning pipe, a grout stop plug, an anchoring body and a grouting device; one end of the hollow cable body is arranged in the anchoring body, the other end of the hollow cable body is sleeved with the constant resistor, and the first tray, the positioning pipe and the grout stopping plug are all sleeved on the constant resistor; the plurality of grouting devices are arranged on the hollow cable body.
Further, the constant resistance device comprises a wedge-shaped lock, a lock cylinder clamping piece, a constant resistance device sleeve, an inner friction bulge and a second tray; the constant resistor sleeve is sleeved on the outer side of the hollow cable body, the second tray is integrally arranged at the outer side end of the constant resistor sleeve, the wedge-shaped lock is sleeved on the outer side of the hollow cable body and is arranged on the inner side of the constant resistor sleeve, and a lock core clamping piece is arranged between the wedge-shaped lock and the hollow cable body; the constant-resistance device sleeve pipe inside wall evenly is provided with the internal friction arch.
Further, the hollow cable body comprises a steel strand and a resin grouting pipe body, and the steel strand is uniformly wound on the resin grouting pipe body to form the hollow cable body.
Further, the grouting device comprises a flower-shaped bracket and grouting holes; be provided with a plurality of groups of slip casting hole on the cavity funicular body, all be provided with flower type support on every group slip casting hole, flower type support can prop up the steel strand wires and form umbelliform sugarcoated haws node.
Furthermore, the positioning tube is a plastic cylinder and is positioned on the side surface of the first tray.
Furthermore, the grout stopping plug is a conical cylinder with a small front end outer diameter and a large rear end outer diameter, and the grout stopping plug sleeved outside the constant-resistance device sleeve is a rubber cylinder.
Furthermore, the end part of the hollow cable body far away is provided with a turnbuckle, and the outer side of the turnbuckle is provided with a nut.
Furthermore, the grouting connector is connected with a turnbuckle.
Compared with the prior art, the utility model discloses there is following technological effect:
the utility model discloses a constant resistance lets pressure strut and slip casting in unique function of an organic whole, rely on constant resistance device and cable body to realize that the high resistance lets pressure strut during preliminary bracing, make country rock moderate degree under the high constant resistance effect warp, after warping to the certain degree, in time use cavity cable body structure to realize consolidating the secondary slip casting of country rock, avoided the trouble that current constant resistance anchor rope and slip casting anchor rope used simultaneously, the material is practiced thrift, the engineering volume has been reduced, still reduce the destruction of punching to country rock.
The utility model discloses inside wedge tool to lock on the cavity cable body will enter into the constant resistance ware to at round platform form lower extreme and the protruding interact of constant resistance ware internal friction, make the body expand external diameter thickening when wedge tool to lock lower extreme extrusion constant resistance ware body, and round platform body tool to lock lower extreme and the protruding friction emergence friction of constant resistance ware internal friction, rely on the friction to produce the constant resistance that the permanent resistance slided.
The utility model discloses only thick liquid stopper becomes the little big toper section of thick bamboo of rear end external diameter of front end external diameter, and the cover is located the constant resistor outside, between constant resistor sleeve pipe and the drilling pore wall, ends thick liquid stopper to be the rubber material, and its toper hypomere external diameter slightly is greater than the drilling diameter, relies on toper structure and rubber toughness, closely packs the gap between constant resistor sleeve pipe and the drilling, forms block structure for the thick liquid also can not flow along the gap between constant resistor sleeve pipe and the drilling under higher pressure, plays the hole sealing and ends the thick liquid effect.
Drawings
FIG. 1: a front view of a hollow grouting constant-resistance anchor cable for a soft rock roadway;
FIG. 2: a schematic view of a hollow grouting constant-resistance anchor cable constant-resistance device in a soft rock tunnel.
Detailed Description
The technical solution provided by the present invention will be described in detail below with reference to the accompanying drawings through the specific implementation of the present invention, so as to provide the technical personnel in the field to use the present invention, but not to limit the present invention.
Referring to fig. 1 to 2, fig. 1 is a full structure diagram of a hollow grouting constant-resistance anchor cable for a soft rock tunnel according to an embodiment of the present invention; fig. 2 is a detailed view of a portion of a constant resistor according to an embodiment of the present invention.
The method comprises the following specific implementation steps: referring to fig. 1 and 2, in the present invention, a soft rock roadway hollow grouting constant-resistance anchor cable comprises a nut 86, a hollow cable body 75, a wedge-shaped lock 87, an integral internal friction constant-resistance device containing a second tray, a first tray 78, a positioning tube 77, a grout-stopping plug 83, a flower-shaped bracket 73, and a sugarcoated haw type umbrella-shaped cable body 72.
The port nut 86 is a hexagonal nut and is connected with a screw buckle 88 of a grouting port of the hollow cable body, after the constant-resistance hollow grouting anchor cable is installed, the port nut 86 is unscrewed during grouting, then one end of the grouting connector is connected with the screw buckle 88, and the other end of the grouting connector is connected with a grouting pump grout outlet pipe joint.
The second constant resistance device is composed of a wedge-shaped lock 87, a lock core clamping piece 85, a constant resistance device sleeve 76, a friction bulge 82 and a second tray 84. The second tray 84 and the constant resistor sleeve 76 are integrated through a die casting process, the second tray 84 is a large-thickness high-strength tray, and when large extrusion force is generated on the surrounding rock acting tray, the tray can be prevented from being separated from the constant resistor body, and the interaction state of the surrounding rock and the constant resistor under high resistance is guaranteed. The wedge-shaped lock 87 is a high-strength lock with a truncated cone shape at the outer part, a small front end and a large rear end, and the inner part is tightly clamped and locked with the hollow anchor cable body through the wedge-shaped lock core clamping piece 85, so that the force on the second tray 84 and the first tray 78 is transmitted to the hollow cable body 75 through the cable. The constant resistor is a cylindrical heat-treatment friction-resistant steel pipe, and the inside of the steel pipe is provided with a pipe body with a friction bulge 82 structure. The constant resistor casing 76 internally contains a friction bulge 82 after heat treatment, the friction bulge 82 and the constant resistor casing 76 are of an integrated structure, when surrounding rocks extrude the second tray 84 and the first tray 78 to drive the constant resistor casing 76 to move to a free space, the wedge-shaped lockset 87 on the hollow cable body 75 enters the constant resistor casing 76 and interacts with the constant resistor internal friction bulge 82 at the lower end of the wedge-shaped lockset 87, the expanding outer diameter of the casing is thickened when the constant resistor casing 76 is extruded by the lower end of the wedge-shaped lockset 87, and the friction action is generated between the lower end of the wedge-shaped lockset 87 and the constant resistor internal friction bulge 82 to generate constant resistance of constant resistance sliding by means of friction.
The hollow cable body 75 is a hollow groutable cable body which is wrapped by winding 1 × 19 strands of high-strength steel strands and internally comprises a high-strength resin grouting pipe body 81 and integrates the anchor cable and the grouting function; 2-3 umbrella-shaped sugarcoated haws nodes 72 are arranged at the middle section, the positions of the nodes are provided with flower-shaped brackets 73 to enable the externally wound rope bodies to be umbrella-opened and supported to form the sugarcoated haws umbrella-shaped structures 72, and the grouting holes 80 in the inner parts are exposed to form outlet channels of grouting liquid.
The outer side of the constant resistor contains a positioning pipe 77 and a conical slurry stop plug 83. The registration arm 77, for the plastics drum, its internal diameter is 2mm than the constant-impedance device external diameter big, can overlap in the constant-impedance device and be close to first tray 78 position department, its length is confirmed to the fixed position of only filling in the thick liquid stopper 83 of plastics drum as required, the registration plug is located and ends between thick liquid stopper 83 and the first tray 78, relies on the fixed position of only filling in of the support of first tray 78, prevents simultaneously that slip back slip casting thick liquid high pressure effect from extrudeing only filling in the thick liquid stopper 83 and making only filling in the thick liquid stopper 83 cunning, causes the thick liquid to flow out. The grout stop plug 83 is a conical cylinder with a small front end outer diameter and a large rear end outer diameter, is sleeved outside the constant-resistance casing pipe 76 and is positioned between the constant-resistance casing pipe 76 and the wall 74 of the drilled hole, the grout stop plug 83 is made of rubber, the outer diameter of the conical lower section of the grout stop plug is slightly larger than the diameter of the drilled hole by 4-6 mm, and a gap between the constant-resistance casing pipe 76 and the drilled hole 74 is tightly plugged by means of a conical structure and the toughness of the rubber to form a blocking structure, so that grout can not flow out along the gap between the constant-resistance casing pipe 76 and the drilled hole 74 under high pressure, and the grout stop effect of hole sealing is achieved.
When a large extrusion force is generated on the surrounding rock acting tray, the tray can be prevented from being separated from the constant-resistance pipe body, and the interaction state of the surrounding rock and the constant-resistance device under high resistance is ensured. The internal friction that contains after the thermal treatment of permanent resistance ware is protruding, and the protruding and permanent resistance ware body formula structure as an organic whole of friction, when surrounding rock extrusion tray drives the permanent resistance ware and removes to free space, wedge tool to lock on the cavity cable body will enter into inside the permanent resistance ware to at the protruding interact of round platform form lower extreme and the inside friction of permanent resistance ware, make the body expand external diameter when wedge tool to lock lower extreme extrusion permanent resistance ware body and become thick, and round platform body tool to lock lower extreme and the protruding friction that takes place of the inside friction of permanent resistance ware, rely on the friction to produce the permanent resistance that the permanent resistance slided.
During specific installation, firstly, the anchor cable hole is subjected to hollow grouting and constant resistance, then the hollow cable body 75 is adopted to jack the resin explosive roll into the bottom of the drilled hole, the anchor cable drilling machine is adopted to stir to form the anchoring body 71, and the hollow cable body 75 is anchored in the drilled hole by means of the resin anchoring body 71. Then the constant choke sleeve 76 which is sequentially arranged on the constant choke sleeve 76 is sleeved with the first tray 78, the positioning pipe 77 and the grout stop plug 83, and then the constant choke sleeve 76 which is provided with the first tray 78, the positioning pipe 77 and the grout stop plug 83 is plugged into the drill hole. After the constant-resistance device sleeve 76 is installed, the wedge-shaped lock 87 and the lock cylinder clamping piece 85 are sequentially plugged into the tail end of the second tray 78 of the constant-resistance device sleeve, the tensioning jack is adopted to jack the rigging 87 into the constant-resistance device sleeve 76 to achieve rope body stretching, then the surrounding rock is subjected to high-resistance yielding deformation under the support of the constant-resistance device anchor rope, and the wedge-shaped lock 87 slides in the constant-resistance device sleeve 76 to move, so that the surrounding rock is deformed. Through the observation of the deformation amount of the ore deposit pressure, when the deformation amount of the surrounding rock reaches a certain value, the port nut 86 is unscrewed, then one end of the grouting device is screwed with the screw buckle 86, the other end of the grouting device is connected with the joint of the grout outlet pipe of the grouting pump, then the grouting pump opening valve is opened, grouting grout enters the drill hole from the grouting pipe 81 in the hollow cable body, finally flows out along the eyelet 80 at the umbrella-shaped structure 72 and enters the drill hole, and is filled in the surrounding rock cracks around the drill hole, so that the grouting reinforcement of the surrounding rock is realized.
The outer side of the constant resistance device is provided with a grouting plug positioning pipe and a conical grout stopping plug. The utility model discloses a slip casting machine, including the stopper, the stopper is fixed to the stopper, the stopper is located between the stopper and the tray, the location pipe, for the plastics drum, its internal diameter is 2mm than the constant stopper external diameter, can overlap in the constant stopper and be close to tray position department, its length is confirmed to the fixed position that only starch filled in of plastics drum as required, the location stopper is located between the stopper and the tray, relies on the fixed stopper position that only starch of support of tray, prevents simultaneously that slip casting back slip high pressure effect extrusion only starch filled in and stops the stopper and make only starch to block the gliding, causes the thick liquid to flow out. The grout stop plug is a conical cylinder with small front end outer diameter and large rear end outer diameter, is sleeved on the outer side of the constant resistor and is positioned between the constant resistor sleeve and the wall of the drill hole, is made of rubber, has a conical lower section outer diameter slightly larger than the diameter of the drill hole by 4-6 mm, and tightly plugs a gap between the constant resistor sleeve and the drill hole by means of a conical structure and rubber toughness to form a blocking structure, so that grout can not flow out along the gap between the constant resistor sleeve and the drill hole under high pressure, and the grout stop effect of hole sealing is achieved.
Therefore, the hollow grouting constant-resistance anchor cable for the soft rock roadway has the unique function of integrating constant-resistance yielding support and grouting, the high-resistance yielding support is realized by the constant-resistance device 76 and the hollow cable body 75 during primary support, the surrounding rock is moderately deformed under the action of high constant resistance, and after the surrounding rock is deformed to a certain degree, the hollow cable body 75 is used for realizing secondary grouting reinforcement on the surrounding rock in time, so that the trouble of using the existing constant-resistance anchor cable and grouting anchor cable simultaneously is avoided, the material is saved, the engineering quantity is reduced, and the damage of punching on the surrounding rock is also reduced.
Furthermore, although the description is made in terms of embodiments, not every embodiment includes only a single embodiment, and such descriptions in the description are merely for clarity reasons, and it is to be understood that those skilled in the art will recognize that the embodiments described in the various embodiments can be combined as appropriate to form an embodiment understood by those skilled in the art.
Claims (8)
1. A hollow grouting constant-resistance anchor cable for a soft rock roadway is characterized by comprising a hollow cable body (75), a wedge-shaped lockset (87), a constant-resistance device, a first tray (78), a positioning pipe (77), a grout stop plug (83), an anchoring body (71) and a grouting device; one end of the hollow cable body (75) is arranged in the anchoring body (71), the other end of the hollow cable body is sleeved with a constant resistance device, and the first tray (78), the positioning pipe (77) and the grout stop plug (83) are sleeved on the constant resistance device; a plurality of grouting devices are arranged on the hollow cable body (75).
2. The soft rock roadway hollow grouting constant-resistance anchor rope is characterized in that a constant-resistance device comprises a wedge-shaped lock (87), a lock cylinder clamping piece (85), a constant-resistance device sleeve (76), an inner friction bulge (82) and a second tray (84); the constant-resistance device sleeve (76) is sleeved on the outer side of the hollow cable body (75), the second tray (84) is integrally arranged at the outer side end of the constant-resistance device sleeve (76), the wedge-shaped lock (87) is sleeved on the outer side of the hollow cable body (75), the inner side of the constant-resistance device sleeve (76) is provided with a lock cylinder clamping piece (85) between the wedge-shaped lock (87) and the hollow cable body (75); inner friction bulges (82) are uniformly arranged on the inner side wall of the constant-resistance device sleeve (76).
3. The soft rock roadway hollow grouting constant-resistance anchor rope according to claim 2, wherein the hollow rope body (75) comprises steel strands and a resin grouting pipe body (81), and the steel strands are uniformly wound on the resin grouting pipe body (81) to form the hollow rope body (75).
4. The hollow grouting constant-resistance anchor cable for the soft rock tunnel as claimed in claim 3, wherein the grouting device comprises a flower-shaped bracket (73) and a grouting hole (80); a plurality of groups of grouting holes (80) are formed in the hollow rope body (75), each group of grouting holes (80) is provided with a flower-shaped support (73), and the flower-shaped supports (73) can support the steel strands to form the umbrella-shaped sugarcoated haws nodes (72).
5. The hollow grouting constant-resistance anchor rope for the soft rock roadway as claimed in claim 1, wherein the positioning pipe (77) is a plastic cylinder and is positioned on the side surface of the first tray (78).
6. The hollow grouting constant-resistance anchor rope for the soft rock roadway according to claim 1, wherein the grout stop plug (83) is a conical cylinder with a small outer diameter at the front end and a large outer diameter at the rear end, and the grout stop plug (83) sleeved outside the constant-resistance casing pipe (76) is a rubber cylinder.
7. The anchor rope of claim 1, wherein the end of the hollow rope body (75) away from the anchor rope body is provided with a turnbuckle (88), and the outer side of the turnbuckle (88) is provided with a nut (86).
8. The hollow grouting constant-resistance anchor cable for the soft rock tunnel as claimed in claim 7, wherein the grouting connector is connected with a turnbuckle (88).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222303781.4U CN218376527U (en) | 2022-08-31 | 2022-08-31 | Hollow grouting constant-resistance anchor cable for soft rock roadway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222303781.4U CN218376527U (en) | 2022-08-31 | 2022-08-31 | Hollow grouting constant-resistance anchor cable for soft rock roadway |
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| CN218376527U true CN218376527U (en) | 2023-01-24 |
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| CN202222303781.4U Active CN218376527U (en) | 2022-08-31 | 2022-08-31 | Hollow grouting constant-resistance anchor cable for soft rock roadway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788538A (en) * | 2023-01-31 | 2023-03-14 | 中国矿业大学(北京) | Constant-resistance large-deformation hollow grouting-resin coupling anchoring bolt |
| CN116906100A (en) * | 2023-09-12 | 2023-10-20 | 中国矿业大学(北京) | Intelligent pre-tightening yielding anchor cable and application method |
-
2022
- 2022-08-31 CN CN202222303781.4U patent/CN218376527U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115788538A (en) * | 2023-01-31 | 2023-03-14 | 中国矿业大学(北京) | Constant-resistance large-deformation hollow grouting-resin coupling anchoring bolt |
| CN116906100A (en) * | 2023-09-12 | 2023-10-20 | 中国矿业大学(北京) | Intelligent pre-tightening yielding anchor cable and application method |
| CN116906100B (en) * | 2023-09-12 | 2023-11-28 | 中国矿业大学(北京) | Intelligent pre-tightening yielding anchor cable and application method |
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